-int OBJECT_IDENTIFIER_get_single_arc(uint8_t *arcbuf, unsigned int arclen,
- signed int add, void *value, unsigned int value_size);
-int OBJECT_IDENTIFIER_set_single_arc(uint8_t *arcbuf,
- const void *arcval, unsigned int arcval_size, int _prepared_order);
+
+/*
+ * Retrieve a single arc of size from the (arcbuf) buffer.
+ * RETURN VALUES:
+ * -1: Failed to retrieve the value from the (arcbuf).
+ * >0: Number of bytes consumed from the (arcbuf), <= (arcbuf_len).
+ */
+ssize_t OBJECT_IDENTIFIER_get_single_arc(const uint8_t *arcbuf,
+ size_t arcbuf_len,
+ asn_oid_arc_t *ret_value);
+
+/*
+ * Write the unterminated arc value into the (arcbuf) which has the size at
+ * least (arcbuf_len).
+ * RETURN VALUES:
+ * -1: (arcbuf_len) size is not sufficient to write the value.
+ * <n>: Number of bytes appended to the arcbuf (<= arcbuf_len).
+ */
+ssize_t OBJECT_IDENTIFIER_set_single_arc(uint8_t *arcbuf, size_t arcbuf_len,
+ asn_oid_arc_t arc_value);